Patent · US Active

Cellulose ethers and their use

US9580581B2 · kind B2 · utility

3Cited by

7References

16Claims

0Family size

Assignee

DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

Roland Adden · Bad Fallingbostel, DE
Meinolf Brackhagen · Walsrode, DE
Matthias Knarr · Nienburg/Weser, DE
Roland Bayer · Walsrode, DE

Key dates

Filing date	Oct 6, 2011
Grant date	Feb 28, 2017
Priority date	—
Expiry date	Mar 17, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2666/54
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Cellulose ethers are described which are useful in compositions for extrusion-molded bodies. In these cellulose ethers the ether substituents are methyl groups, hydroxyalkyl groups, and optionally alkyl groups being different from methyl, the cellulose ether has an MS (hydroxyalkyl) of 0.11 to 1.00, and hydroxy groups of anhydroglucose units are substituted with methyl groups such that [s23/s26−0.2*MS (hydroxyalkyl)] is 0.35 or less, wherein s23 is the molar fraction of anhydroglucose units wherein only the two hydroxy groups in the 2- and 3-positions of the anhydroglucose unit are substituted with methyl groups and wherein s26 is the molar fraction of anhydroglucose units wherein only the two hydroxy groups in the 2- and 6-positions of the anhydroglucose unit are substituted with methyl groups.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.